1 /* 2 * Copyright (c) 1988, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#) Copyright (c) 1988, 1993, 1994 The Regents of the University of California. All rights reserved. 34 * @(#)number.c 8.3 (Berkeley) 5/4/95 35 * $FreeBSD: src/games/number/number.c,v 1.12 1999/12/12 03:22:35 billf Exp $ 36 * $DragonFly: src/games/number/number.c,v 1.5 2008/06/05 18:06:30 swildner Exp $ 37 */ 38 39 #include <sys/types.h> 40 41 #include <ctype.h> 42 #include <err.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <unistd.h> 47 48 #define MAXNUM 65 /* Biggest number we handle. */ 49 50 static const char *name1[] = { 51 "", "one", "two", "three", 52 "four", "five", "six", "seven", 53 "eight", "nine", "ten", "eleven", 54 "twelve", "thirteen", "fourteen", "fifteen", 55 "sixteen", "seventeen", "eighteen", "nineteen", 56 }, 57 *name2[] = { 58 "", "ten", "twenty", "thirty", 59 "forty", "fifty", "sixty", "seventy", 60 "eighty", "ninety", 61 }, 62 *name3[] = { 63 "hundred", "thousand", "million", "billion", 64 "trillion", "quadrillion", "quintillion", "sextillion", 65 "septillion", "octillion", "nonillion", "decillion", 66 "undecillion", "duodecillion", "tredecillion", "quattuordecillion", 67 "quindecillion", "sexdecillion", 68 "septendecillion", "octodecillion", 69 "novemdecillion", "vigintillion", 70 }; 71 72 void convert (char *); 73 int number (char *, int); 74 void pfract (int); 75 void toobig (void); 76 int unit (int, char *); 77 void usage (void); 78 79 int lflag; 80 81 int 82 main(int argc, char **argv) 83 { 84 int ch, first; 85 char line[256]; 86 87 lflag = 0; 88 while ((ch = getopt(argc, argv, "l")) != -1) 89 switch (ch) { 90 case 'l': 91 lflag = 1; 92 break; 93 case '?': 94 default: 95 usage(); 96 } 97 argc -= optind; 98 argv += optind; 99 100 if (*argv == NULL) 101 for (first = 1; 102 fgets(line, sizeof(line), stdin) != NULL; first = 0) { 103 if (strchr(line, '\n') == NULL) 104 errx(1, "line too long."); 105 if (!first) 106 (void)printf("...\n"); 107 convert(line); 108 } 109 else 110 for (first = 1; *argv != NULL; first = 0, ++argv) { 111 if (!first) 112 (void)printf("...\n"); 113 convert(*argv); 114 } 115 exit(0); 116 } 117 118 void 119 convert(char *line) 120 { 121 int flen, len, rval; 122 char *p, *fraction; 123 124 flen = 0; 125 fraction = NULL; 126 for (p = line; *p != '\0' && *p != '\n'; ++p) { 127 if (isblank(*p)) { 128 if (p == line) { 129 ++line; 130 continue; 131 } 132 goto badnum; 133 } 134 if (isdigit(*p)) 135 continue; 136 switch (*p) { 137 case '.': 138 if (fraction != NULL) 139 goto badnum; 140 fraction = p + 1; 141 *p = '\0'; 142 break; 143 case '-': 144 if (p == line) 145 break; 146 /* FALLTHROUGH */ 147 default: 148 badnum: errx(1, "illegal number: %s", line); 149 break; 150 } 151 } 152 *p = '\0'; 153 154 if ((len = strlen(line)) > MAXNUM || 155 (fraction != NULL && ((flen = strlen(fraction)) > MAXNUM))) 156 errx(1, "number too large, max %d digits.", MAXNUM); 157 158 if (*line == '-') { 159 (void)printf("minus%s", lflag ? " " : "\n"); 160 ++line; 161 --len; 162 } 163 164 rval = len > 0 ? unit(len, line) : 0; 165 if (fraction != NULL && flen != 0) 166 for (p = fraction; *p != '\0'; ++p) 167 if (*p != '0') { 168 if (rval) 169 (void)printf("%sand%s", 170 lflag ? " " : "", 171 lflag ? " " : "\n"); 172 if (unit(flen, fraction)) { 173 if (lflag) 174 (void)printf(" "); 175 pfract(flen); 176 rval = 1; 177 } 178 break; 179 } 180 if (!rval) 181 (void)printf("zero%s", lflag ? "" : ".\n"); 182 if (lflag) 183 (void)printf("\n"); 184 } 185 186 int 187 unit(int len, char *p) 188 { 189 int off, rval; 190 191 rval = 0; 192 if (len > 3) { 193 if (len % 3) { 194 off = len % 3; 195 len -= off; 196 if (number(p, off)) { 197 rval = 1; 198 (void)printf(" %s%s", 199 name3[len / 3], lflag ? " " : ".\n"); 200 } 201 p += off; 202 } 203 for (; len > 3; p += 3) { 204 len -= 3; 205 if (number(p, 3)) { 206 rval = 1; 207 (void)printf(" %s%s", 208 name3[len / 3], lflag ? " " : ".\n"); 209 } 210 } 211 } 212 if (number(p, len)) { 213 if (!lflag) 214 (void)printf(".\n"); 215 rval = 1; 216 } 217 return (rval); 218 } 219 220 int 221 number(char *p, int len) 222 { 223 int val, rval; 224 225 rval = 0; 226 switch (len) { 227 case 3: 228 if (*p != '0') { 229 rval = 1; 230 (void)printf("%s hundred", name1[*p - '0']); 231 } 232 ++p; 233 /* FALLTHROUGH */ 234 case 2: 235 val = (p[1] - '0') + (p[0] - '0') * 10; 236 if (val) { 237 if (rval) 238 (void)printf(" "); 239 if (val < 20) 240 (void)printf("%s", name1[val]); 241 else { 242 (void)printf("%s", name2[val / 10]); 243 if (val % 10) 244 (void)printf("-%s", name1[val % 10]); 245 } 246 rval = 1; 247 } 248 break; 249 case 1: 250 if (*p != '0') { 251 rval = 1; 252 (void)printf("%s", name1[*p - '0']); 253 } 254 } 255 return (rval); 256 } 257 258 void 259 pfract(int len) 260 { 261 static const char *pref[] = { "", "ten-", "hundred-" }; 262 263 switch(len) { 264 case 1: 265 (void)printf("tenths.\n"); 266 break; 267 case 2: 268 (void)printf("hundredths.\n"); 269 break; 270 default: 271 (void)printf("%s%sths.\n", pref[len % 3], name3[len / 3]); 272 break; 273 } 274 } 275 276 void 277 usage(void) 278 { 279 (void)fprintf(stderr, "usage: number [# ...]\n"); 280 exit(1); 281 } 282